Combined lifting jack and press



Sept. 9, 1958 J. F. HILDING 2,851,247

COMBINED LIFTING JACK AND mass Filed Aug. 1, 1955 INVENTOR. J'oH/v F H/LDING.

COMBINED LIFTING JACK AND PRESS John F. I-Iilding, Phoenix, Ariz.

Application August 1, 1955, Serial No. 525,674

1 Claim. (Cl. 254-8) This invention pertains to improvements in liftingap- 7 paratus and is particularly directed to a combination lifting jackand press.

One of the objects of this invention is to provide a lifting apparatuswhich is adapted to handling low slung parts for automotive vehiclessuch as transmissions, gear cases and the like, while at the same timeit is readily adjustable for high lift position for raising motor andengine blocks up over the front fenders of the motor vehicle.

Still another object of this invention is to provide an improvedcombination lifting apparatus and press which is adapted to a widevariety of heights of lifting and which may also be arranged to functionas a press for working on automotive equipment.

Another object of this invention is to provide a simplified liftingdevice which may be readily adjusted for different heights of lift fromlow underslung ground level to relatively high position for motorraising and the like.

Further features and advantages of this invention will appear from adetailed description of the drawings in which:

Fig. 1 is a general perspective view of the apparatus incorporating thefeatures of this invention.

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. 3 is a side elevation of the apparatus shown in Fig. 2.

Fig. 4 is a rear end elevation of the apparatus shown in Fig. 3.

Fig. 5 is a fragmentary rear elevation showing the apparatus adapted forpressing operations.

As an example of one embodiment of this invention there is shown acombined lifting jack and press comprising a base plate to which arerigidly fixed the side frames 11 and 1-2, on the outer ends of which aremounted the ground contacting rollers 13. Under the forward end of thebase plate 10 are the swivel casters 14. Rigidly secured to the topsurface 15 are fixed the mounting pieces 16 having bores 1'7 in theirupper ends through which passes the pins 18 which in turn pass throughbores 19 in the upright supports 20 and 21. The upright supports 20 and21 are relatively high and are used for mounting purposes in utilizingthe device in high level lifting such as lifting out motor blocks andthe like from automotive vehicles. A main pivot pin 22 is supported insuitable bores 23 in the webs 24 of the members 20 and 21. On the pin 22is pivotally mounted the side plates 25 and 26 forming the lifting armsfor the device. The outer ends of the side plates 25 and 26 carry a pin27 upon which is pivotally mounted the lifting member 28 having on itstop end the work contacting saddle 29. The saddle 29 is kept in properhorizontal position for engagement of the work by apparatus comprising acrossbar 30 fixed against the rear surfaces 31 of the upright members 20and 21, and extending across horizontally of the two upright membersthrough arcuate slots 32 formed in the side plates 25 and 26.intermediate the ends of the crossbar 3t? and between it 7 I 52,851,247;Patented Sep 9, 1958 on the pin 22 exact parallelism of the saddle 29 ismaintained since the relative position of the pins 22-27 and the pins33-37 are in parallelogram arrangement.

Adjustment. of the turnbuckle 35 may vary the relative tilted positionof the saddle 29 as desired.

Power for actuating the lifting arm comprising the members 25-26 iseffected by a fluid pressure cylinder 38 having the piston rod orplunger 39. The back end of the cylinder 38 has a trunnion 40 whichengages in a socket 41 in the 'T-shaped coupling 42, the top crossmember of the T-shaped member 42 being pivotally mounted on a pin 43carried in the outer ends of the support members 44 in turn attached tothe upright supports 29 and 21. The piston rod likewise has its endengaged in a socket 45 in a similar T-shaped coupling 46 in turnpivotally mounted on a pin 47 carried in the side plates 25 and 26 belowthe pin 22.

The fluid pressure cylinder 38 may be energized by suitable manuallyoperated pump 48 actuated by the hand lever 49 and connected throughsuitable flexible conduits 50 and 51 connected to the pressure chambersof the cylinder 38.

It is important to note that the entire assembly comprising the liftingarms 25-26 carried on the pin 22 and the fluid pressure cylinder 38 andits connecting members described carried on the support members 44connected by suitable detachable bolts 52 to the frames 20 and 21 may beadjusted up and down to various positions on the upright supports 28 and21. For example, as shown in full line in Fig. 3 the unit is shown inhigh position for manipulating the motor into and out of a motorvehicle. In the position shown in broken line at 53 the same unit hasbeen moved down preferably on lower supports 54 for reaching under amotor vehicle to manipulate the transmission, gearcase clutch and thelike, members from their attached position with the engine. It is alsoimportant to note that a cross member 55 may be placed across the upperends and rigidly connected to the upright supports 20 and 21 and whichcontains either a flat surface 56 for abutment of the trunnion end 40 ofthe cylinder 38 there again or a pin such as the pin 23 may be utilizedto support the upward thrust of the cylinder 38. Platen members 56 mayalso be secured to the upright supports 20 and 21 below the crossmembers 55 for supporting a work piece 57 which is to be operated on bythe piston rod 39 of the cylinder 38 such as in pressing bearings intoand out of automotive parts.

it is also within the scope of this invention to arrange the liftupcylinder assembly as shown in broken line in Fig. 3 wherein the cylinder38 may be pivotally mounted at its bottom end on a suitable pin 43acarried in the mounting pieces 16 and the lower portions of the uprightsupports 20 and 21. The piston rod 39 of the cylinder is connectedthrough a turnbuckle 35a to a pin 47a carried in the lifting arms 25-26.By this arrangement a direct upward thrust is provided for the arms25-26 and the turnbuckle may be adjusted to control the overall liftingposition of the arms.

There has thus been provided a combination lifting jack and press deviceutilizing common support members and connecting elements for carryingout all of the functions of the device.

While the apparatus herein disclosed and described constitutes apreferred form of the invention, it is also to be understood that theapparatus is capable of mechanical alteration without departing from thespirit of the invention and that such mechanical arrangement andcommercial adaptation as fall within the scope of the appendent claimare intended to be included herein.

Having thus fully set forth and described this invention What is claimedand desired to be obtained by United.

States Letters Patent is:

In combination in a lifting jack having a, base plate, side frames fixedto said base plate, ground contacting rollers on the outer ends of saidside frames and under the forward end of said base plate, and uprightsupports of varying heights demountably secured to the top of said baseplate, a main pivot pin supported horizontally in said upright supports,a lifting arm including side plates pivotally mounted on said main pivotpin, said side plates having arcuate slots adjacent said main pivot pin;a lifting pin fixed horizontally in'the outer ends of said side platesparallel to said main pivot pin, a lifting member including a workcontacting saddle pivotally mounted on said lifting pin, a cross bardemountably fixed horizontally across said upright supports and passingthrough said arcuate slots in said side plates, said arcuate slots beingradially positioned relative to the 4 axis of said main pivot pin, a rodpivotally connected at one end intermediate the ends of said cross barbetween said arcuate slots and pivotally connected at its other end tosaid lifting member at a point below said lifting pin so that said workcontacting saddle remains in horizontal position during the swinging ofsaid lifting memher on said main pivot pin, a fluid pressure cylinderpivotally mounted at its back end on said upright supports on theopposite side thereof from said lifting arm, and a piston plunger insaid cylinder extending horizontally therefrom and pivotally connectedto said lifting arm side platesat a position below said main pivot pin.

References Cited in the file of this patent UNITED STATES PATENTS1,553,074 Engel Sept. 8, 1925 1,837,600 Warshaw Dec. 22, 1931 1,843,968Bellows Feb. 9, 1932 2,535,753 Parker .4 Dec. 26, 1950 2,643,779 HamlinJune 30, 1953 2,675,209 Freed Apr. 13, 1954

